Developing innovative, energy-efficient technologies to capture CO₂ from marine emissions and convert it represents an effective way to move toward a circular approach to reduce CO₂ emissions. Additionally, SO₂ removal, as a short-term interim solution for the current maritime sector, allows the use of less desulfurized/expensive fuels to meet International Maritime Organization emission standards. In this context, we investigated an integrated process of capturing CO₂/SO₂ onboard ships and converting captured CO₂, thus initiating a process close to carbon neutrality. CO₂ absorption by monoethanolamine and SO₂ scrubbing with seawater were envisaged in packed-bed columns, whose hydrodynamics and performance were analyzed under vertical, inclined, and rolling conditions using three-dimensional (3D) Eulerian models to understand their behavior under changing ocean states. CO₂ conversion via an integrated process combining a sorption-enhanced reverse water gas shift and sorption-enhanced methanol synthesis was proposed. By including a reverse water gas shift and in situ H₂O removal, CO and methanol yields were significantly improved.

中文翻译：

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通过二氧化碳捕集/化学转化和二氧化硫海水洗涤减少船舶废气排放的模型


开发创新、节能的技术来捕获海洋排放中的二氧化碳 ₂ 并将其转化，是实现减少二氧化碳 ₂ 排放的循环方法的有效途径。此外，SO ₂ 去除作为当前海事部门的短期临时解决方案，允许使用较少脱硫/昂贵的燃料来满足国际海事组织的排放标准。在此背景下，我们研究了捕获船上 CO ₂ /SO ₂ 并转化捕获的 CO ₂ 的集成过程，从而启动接近碳中和的过程。设想在填充床塔中用单乙醇胺吸收 CO ₂ 和用海水洗涤 SO ₂ ，并使用三维 (3D) 分析在垂直、倾斜和滚动条件下的流体动力学和性能。 3D) 欧拉模型，用于了解海洋状态变化下的行为。提出了通过吸附强化反向水煤气变换和吸附强化甲醇合成相结合的集成工艺来转化CO ₂ 。通过反向水煤气变换和原位 H ₂ O 去除，CO 和甲醇产率显着提高。